Motorna, O. V., and V. I. Shevchuk. “On One Reverse Asymptotic Equality”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 4 (May 23, 2022): 572 - 576. Accessed April 16, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7111.